Which term describes widening of a blood vessel due to pressure on weakened tissues forming a sac?

• A. Pulse
• B. Aneurysm
• C. AAA
• D. Rub

Answer: (B)

Aneurysm is the idea being tested. It refers to a localized widening or dilation of a blood vessel that occurs when the wall becomes weakened, causing the vessel to form a sac-like outpouching. That description fits the scenario of pressure expanding a weakened area into a sac. The other terms don’t capture this structural dilation: a pulse is just the rhythmic expansion from the heartbeat, not a lasting widening; an abdominal aortic aneurysm is a specific instance of an aneurysm in the abdominal aorta, so while related it’s not the general term; and rub is unrelated.